Sequel to Fate Level Zero. Ten years have passed since the Fourth Grail War. Ancient powers stir once more as Masters are sought out and Servants summoned. And yet, the Chaos of the past War resurfaces as the Servants that were given were not quite as expected. Except Saber of course... and Archer.

It is said that the Throne of Heroes calls upon heroes from beyond space and time to participate in the Holy Grail Wars. Now, watch as we see a different 4th Grail War occur, one which every Servant but Saber get swapped by another legendary hero...

When selecting Servants for the Fourth Holy Grail War, a new log of history with numerous heroes came to light, outside of the normal books and legends. With this new knowledge, the Grail demanded they be resurrected to fight in the War. How was it supposed to know that they were fictional characters from computer games?

The Fifth Holy Grail War has taken an interesting turn. Out of all the Heroic Spirits that usually participate in it on multiple worlds, only one is present and with a different class. The rest have been replaced, but it will not make this version of the War any less interesting... only maybe, how to say it? a bit crazier. Rated T just for safety.

The old generation of servants have been replaced with seven gaming legends, each a bookmark in the history of video games, an icon of their companies! Now facing each other in a big battle royale they will alter history to prove their superiority! Who will win? Who will lose? and how will they change the world? Servants! Magi! Let the game begin!

Rin summons her servant for the Holy Grail War. But this white-haired, red-clad hero is none other than Ragna the Bloodedge! The rules of the Holy Grail War have changed, and more than one world can be saved or lost this time.